Function Positioning
This component is situated at the critical interface between the fixed base frame and the upper tilting frame of the container tilter. It serves as the sole pivot bearing point for the entire tilting assembly, responsible for sustaining the full tipping torque generated by a fully loaded container-exceeding 40 metric tons-throughout the complete 0° to 90° tilting arc. Any failure at this junction would result in uncontrolled rotation, making it the most safety-critical structural element of the machine.
Structural Composition
1. Slewing Bearing
The slewing bearing forms the mechanical heart of the pivot assembly. Its outer ring is rigidly bolted to the base frame, while the inner ring is fastened to the tilting frame via high-strength Grade 10.9 bolts arranged in a circular pattern. This configuration transfers the entire overturning moment from the tilting frame into the base structure, allowing smooth, controlled rotation under extreme load conditions. The bearing is selected for its high static and dynamic load ratings, with built-in seals to exclude contamination from the harsh operating environment.
2. Hydraulic Locking Pin
At the two extreme positions-0° (fully horizontal) and 90° (fully vertical)-a hydraulic cylinder drives a hardened steel pin into precision-machined holes on the side plates of the tilting frame. This positive mechanical lock prevents unintended rotation caused by hydraulic pressure fluctuations, gravitational creep, or external impacts. The pin is spring-returned to the retracted position during normal tilting operation, engaging only at the designated endpoints.3. Limit Block
Heavy-duty steel limit blocks are welded symmetrically on both sides of the base frame, physically restricting the maximum tilting angle to no more than 90°. These blocks serve as a final mechanical safety barrier, ensuring that even in the event of hydraulic or control system failure, the frame cannot over-rotate and cause structural damage or load spillage.
Locking Pin Synchronization Control
The hydraulic locking pins of the container tilters on both sides are actuated by a single solenoid valve, guaranteeing simultaneous engagement and retraction. A travel switch (limit switch) is installed at each pin station to confirm full in-position status before the system permits any tilting operation. The control logic enforces a strict interlock:
If either pin fails to confirm its in-position signal, the tilting sequence is blocked entirely.
This dual-channel verification eliminates the risk of asymmetric locking-a condition that could induce torsional stress on the slewing bearing and lead to catastrophic structural failure. The synchronization requirement is hardwired into the container tilter machine's safety PLC, making it non-bypassable under normal operation.
